external sd card gets read only

man1920

Hi Sir,

I am using RK3399 Board for my development and using External SDCard for storage purpose.
I am able to build and boot the board with Android 7.1 and able to access the external SD card.

While testing  sometime when I am trying to save any data on SDCard i get error SD card is read only.
Error
System.err: java.io.FileNotFoundException: /storage/emulated/0/User_Notes.txt (Read-only file system)

This error is not frequent. But some time I face this issue.

After Restart everything works fine. I checked my SD Card and it is also working fine.

Since I am not facing this issue every time hence I am not sure what might be issue ?

Any suggestion what might be issue in Android side? or BSP side ? Or how can I root cause this issue ?  

Thanks

man1920

Any help ? Any solutions ? Any Suggestion ?